Preheat oven to 400. In a large skillet over med high heat, melt the butter with the oil and cook the celery and carrots til tender, about 3 min. Add chicken and hot suuce to the pan and toss together with salt and pepper. Set aside and let cool.

When the filling is cool (we're serious about this, it messes up the dough if it's too hot) roll out the dough into a large rectangle on a floured surface. Spread the cooled filling evenly onto the entire dough, making sure not to get too close to the edge. Top with cheeses and green onion.

Roll up the dough starting at one the the long sides, tucking in both ends firmly. Press seams with fingers to seal. Whisk the egg with a splash of water and brush all over the stromboli, then sprinkle seeds. Carefully transfer to lightly greased baking sheet and bake for 40 min.

Slice to serve. I fed my whole family with one, and there's nine of us...7 over 8 yrs, and two little ones. I think the Rachel Ray site says it serves 4.